<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>

  <div id="app">
    <h3>小黑水果店</h3>
    <ul>
      <li v-for="(item, index) in list">
        {{ item }} - {{ index }}
      </li>
    </ul>

    <ul>
      <li v-for="item in list">
        {{ item }}
      </li>
    </ul>

    <ul>
      <li v-for="(item, index) in num">
        {{ item }} - {{ index }}
      </li>
    </ul>

    <ul>
      <li v-for="(a, b) in str">
        {{ a }} - {{ b }}
      </li>
    </ul>

    <ul>
      <li v-for="value, key in user">
        {{ value }} - {{ key }}
      </li>
    </ul>

    <ul>
      <li v-for="item, index in list2">
        <ul>
          <li v-for="item in item">
            {{ item }} - 内层for循环 如何访问到外层循环项变量呢？ {{ item }}
          </li>
        </ul>
      </li>
    </ul>

    <ul>
      <li v-for="item in list">
        {{ item }}
      </li>
    </ul>

  </div>

  <script src="https://unpkg.com/vue@2.7.14/dist/vue.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        item: 'smd',
        num: 5,
        str: 'hello',
        list: ['西瓜', '苹果', '鸭梨', '榴莲'],
        user: { name: 'zs', age: 18 },
        list2: [
          [1, 2, 3],
          [4, 5, 6],
          [7, 8, 9]
        ]
      }
    })
  </script>
</body>
</html>